Drug interactions
Lisdexamfetamine + Trimipramine
Severity: Major
Lisdexamfetamine and Trimipramine: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Lisdexamfetamine is converted to dextroamphetamine, whose cardiovascular effects may be enhanced by tricyclics. This can cause hypertension, tachycardia and arrhythmias, and both drugs lower the seizure threshold.
What this interaction means in plain words
Lisdexamfetamine and Trimipramine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Lisdexamfetamine belongs to Central Nervous System; Trimipramine belongs to Central Nervous System.
Why it happens
Tricyclic blockade of noradrenaline reuptake and CYP2D6 inhibition potentiates amphetamine effects, with additive serotonergic activity.
What to do
Avoid the combination where possible. If both are needed, use low doses and monitor blood pressure, heart rate and signs of serotonin toxicity.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Trimipramine
- Disopyramide + Trimipramine Contraindicated
- Dofetilide + Trimipramine Contraindicated
- Ibutilide + Trimipramine Contraindicated
- Isocarboxazid + Trimipramine Contraindicated
- Pentamidine + Trimipramine Contraindicated
- Phenelzine + Trimipramine Contraindicated
Other interactions of Lisdexamfetamine
- Isocarboxazid + Lisdexamfetamine Contraindicated
- Linezolid + Lisdexamfetamine Contraindicated
- Lisdexamfetamine + Phenelzine Contraindicated
- Lisdexamfetamine + Procarbazine Contraindicated
- Lisdexamfetamine + Rasagiline Contraindicated
- Lisdexamfetamine + Safinamide Contraindicated
Frequently asked questions
Can I take Lisdexamfetamine with Trimipramine?
MediHelp rates the interaction as major. Lisdexamfetamine and Trimipramine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Lisdexamfetamine is converted to dextroamphetamine, whose cardiovascular effects may be enhanced by tricyclics. This can cause hypertension, tachycardia and arrhythmias, and both drugs lower the seizure threshold.
How serious is the interaction between Lisdexamfetamine and Trimipramine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination where possible. If both are needed, use low doses and monitor blood pressure, heart rate and signs of serotonin toxicity.
What other medicines interact with Trimipramine?
MediHelp also lists interactions of Trimipramine with, for example, Disopyramide, Dofetilide, Ibutilide. The full list is on the Trimipramine page.
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